To add to George's suggestions , when I finished off the bilge areas of mine I used the Interlux barrier coat system that I had already barrier coated the hull bottom with .
http://www.yachtpaint.com/usa/diy/pr...ct-2000e.aspx#
The grey finish looks identical to what Donzi used on the classics , is easy to apply by brush - one coat will do it . It's hard as nails and easy to clean plus you never have to worry about water sitting in the bilge for long periods of time.
Just another idea , nothing more , or less
Just because something's old doesn't mean you throw it away !